/Engine/Source/Editor/UnrealEd/Public/AssetThumbnail.h
Brings all items in ThumbnailsToPrioritize to the front of the render stack if they are actually in the stack
void PrioritizeThumbnails ( const [TArray](API\Runtime\Core\Containers\TArray)< [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FAssetThumbnail](API\Editor\UnrealEd\FAssetThumbnail) > > & ThumbnailsToPrioritize, uint32 Width, uint32 Height )